| Glen Helen | |
|---|---|
 Sycamore Grove Marker | |
| Location | San Bernardino, California |
| Coordinates | 34°12′22″N 117°24′20″W / 34.2062°N 117.4055°W |
| Built | 1851 |
| Designated | April 1, 1957 |
| Reference no. | 573 |
  Location of Glen Helen in California | |
Glen Helen Regional Park is a county park located in San Bernardino, California, United States adjacent to the Cajon Pass.[1] It was the site of both US Festivals of the early 1980s. It is also home to the Glen Helen Amphitheater, the largest outdoor amphitheater in the United States.[2] The park also hosts several off-road races since 1985.
- ^ "City Limits". County of San Bernardino Open Governance. San Bernardino County. Retrieved 2018-01-03.
- ^ "Glen Helen Regional Park". Cms.sbcounty.gov. Retrieved 2014-06-01.